Valve for liquids



B. W. THURTELL VALVE FOR LIQUIDS March 2 192e.- 1,574,766

Filed June 16, 1924 Patented Wlan 2, i925.,

BENJAMIN'W. THnfafrnnn, er ourense', iiiniii'ojis VALVE son; nicer-ns.

Application fried June is, i224. serial ne. 720,333'1.

To all whom 'it may concern: 1

Be it known that l, 'Bernardin W. Trion- 'rnnL, a citizen o' the United States, residing` at Chicago, county et Geek, and State oifj lllinois, have invented a new and useiul torni o' Valve for Liquids, ot which the 'following is a specification.

ln all such Valves, commonly called Fuller ball valves, the closing of the valve is accomplished by means ol a ball or piece ot seine compressible or elastic substance, suchas rubber, which, by being' drawn by lever actionv against a metallic seat, closes the valve tof the l'iow el water. y

llhere' hot water is to pass the Valve, the heat added to the constant wear on' the yielding substance oft'- the ball soon destroys the tightness el lit and the Valve commences to leak.

rlo obviate this difficulty, l2 have so constructed my Valve that a metallic ball ina-y be used, which seats against a metall-ic 'seat by virtue oi' the liquid press-ure against it, and when operated to permitthe 'i'low oi' liquid is pressed backward against the liquid pressure by means o' a rod or plunger operated by some" lever action.

ln the accompanying drawings- Fig. l shows in cross-section a valve designed ller laundry use, having' a Y-shaped form, one branch being designed for cold water and the other branch designed for hot water, the two branches uniting in one general conduit where the lliet and cold water mix to give some mean temperature as desired, the ball normally seating by gravity. Fig. 2 is a side View of the valve having attached. a pneumatic cushioning piston and cylinder, shown in section, for preyentinga hammering action as the balls come to seat.

Fig. 1, l is a cross section oit the valve body. ln the upper part olf each branch is an enlargement in which rests a ball ol brass or other metal 2, which seats at 1l, andis held in alignment in its travel by the ribs 31,which allow water to pass by the balls when they are raised from the seat Ll.

5' is a round bar of metal, against the up-` per end of which rests theV balll 2, and which passes downward through a guide 7, screwed into the walls oin the body l and through the stuffing box 8 and a gland 9, also screwed into the walls of the valve body at 10. ln the lower end of rod 5 is a slot ll, into which fits the rounded end l2 of a` yokevv lever arm l2 nfshown jin side View in Fig. 2 and in dotted linesE in- Fig. l. This yolr-e swivels on a screw shank' shown' at 13, 'which is screwed intoaboss 141 cast" oul they body ot the valve- 'lhe horiontal portion oil the yolife lever is ilat on top as* at l5, and' again-st this rests an eccentric ended lever arm- 116 which] swivels on` a pin' 18k that passes thro-ugh ai slotted boss l? shown on lilg. l v'and Fig. 2t rl`he' upperr part of the lever arm is de'` signed as a' handle, at l'Gi-i.

A plate 19' is fastenedE toI the Valve body l by means ci screws 2t),v and i, :tened to the plate by screws 32? is a cylinder 2l, con taining a plunger 22', eup leather 23' and nut holding the cup` leather place; compression spri Q5' rests against thelist-,1t-

toi'n oli the cylinder at 26,' andl against y the end oli a recess in plunger 22 at An extension bu it-on* 'lastensv into the plunger 22. 28 is a Vsinalli orifice near the base of the cylinder"tolpeilrnit air to enter or leave slowlf'i, the whole being so positioned that the handle 116 willI malle Contact with the'` button 2921s the Valve closes. Whenl the valve is open, the spring25V will hold the' plunger andbutton to the outer end" oi itstravel',- in Contact with the cap' 80.

33 are flange unions which fasten to tl'ie upper' and lower outlets of the'valye body by meansof cap screws 84. 35 are' brolren sections oi' pipe that screw into the couplings 33. 4

ln operation, when the' handled@ A1 is' pulled downward, the eccentrici 116, owing to the greater"radiusoiA4 action, will depress the lever 12 A, wl'iicl'i 'swivels at 13, causing the opposite reui'ided ends l2" to rise, carrying with thenr thel rods 35` into which they enga'geas at lll', and raising the balls 2 from theiry seats This permits water to pass betweenI the balls and the valve body and past-the seats, thencefiowingk downward through the ttwo branches `and uniting in the lower commony channel.

if, now, a het water supply isfconnected to thek lett hand branch and a coldy water supply isconnected to'- the right hand branch, and suitable valves in the`- water supply lines are set to give some desired proportionate liow when the line is opened, then with given temperatures in the two supply lines another mean temperature will y nected by a bar,

Y of a. valve body result when waters from the two branches unite in the common channel.

When a sufeient supply of water has been drawn, a slight upward pressure is eX- erted on the lever arm 16 A, until the larger radius 16 of the eccentric has passed a vertical line with the pin 18, when the water pressure on the balls 2, transmitted downward' against rods 5 and lever arm 12, causing opposite end 12 A to press upwardly against the eccentric v1G, will cause the handle 16 AV to liy upward rapidly and strike the button 29, driving it and the plunger toward the bottom of the cylinder, compressing the air underneath the plunger and checking the rapid seating of the balls and preventing any damage that might result due to too rapid a Contact between the ball and its seat, the compressed air escaping slowly through the small orilice 28 near the base of the cylinder. As it may readily be seen, any scarring of the ground surfaces of the ball or seat will cause leakage. Another advantage of this arrangement is that as the rush of water past theball occurs when the valve is open, it will cause a certain amount of rotation of the ball, so that it will always seat at a slightly different position, thus causing an aproximately even wear over the surface of the ball that will aid in maintain-v ing the true spherical shape.

Therefore I claim: Y

1. In a valve structure, the combination of a valve body having a plurality of intake passageways and an outlet passageway, lvalve seats formed in said intake passageways and a ball valve for each seat, a vertically slidable stem below each ball valve, an actuating lever for each stem pivoted to the valve body and connected at its inner end with the lower end of the stem, the outer ends of said levers being conand an actuating n'leinber engaging with said bar to cause simultaneous movement of said levers and raising of the stems to unseat the ball valves.

2. In a valve structure, the combination having a plurality of passageways each provided with a valve seat, a ball valve in each passageway (3o-operating with the seat therein, a vertically slidablc stem below each ball valve and extending to the exterior of the valve body, a bar, levers extending from said bar and pivoted to the valve body, the inner end of each lever engaging with the lower end of one of said stems, and a cam member pivoted to said valve body for engagement with said bar to cause said levers to be swung to simultaneously raise said stems and lift the ball valves oft` their seat.

3. In a valve struct-ure, the combination of a body having a plurality of passageways each provided with a seat and a ball valve therefor, stems vertically reciprocable below said ball valves, a frame pivoted intermediate its ends tosaid body and pivoted at its inner ends to the lower ends of said stems, and a cam member pivoted to said body above the outer end of said frame, an actuating lever for said cam member, actuationof said cam causing movement of said frame to simultaneously raise the stem and the valve balls, said cam member having a locking surface for locking the frame in such valve ball raising position.

et. In a va ve structure comprising a valve body having a passageway provided with a valve seat, a heavy ball valve for said seat, a stem slidable vertically below the center of said valve and extending to the interior of the valve body, a lever pivoted intermediate its ends to the valve body and having pivotal connection at its inner end with the lower end of said stem, an actuating lever pivotedto the valve body above the outer end oi" said lever and having a flattened surface normally engaged by said lever when ie valve ball is on its seat, said lever having a cam 'surface for engaging the said valve lever to cause raising of said stem and removal of the ball valve member from its seat, and means for preventing sudden return of said actuating lever to normal position and for causing retarded seating movement of said valve.

5. In a valve structure, the combination of a valve body having parallel inlet passageways, and a common outlet passageway, each inlet passageway having a valve seat and a ball valve therefor, a vertical stem axially below each ball valve and slidablc in said body, a bar, arms extending from the ends of said bar and pivoted to the valve body, the inner end of each bar being connected with the lower end of the corresponding stem, and actuating lever pivotcd to said valve body over said bar, said actuating lever having a at surface and thc weight of said ball valve on said stem normally holding said bar against said fiat surface, said lever having a cam surface for eng' gement with said bar to swing said arm to cause vertical movement of said stem and raising of said ball valves from their seats, said actuating lever tending to be thrown back suddenly when moved toward normal position, and cushioning means for retarding such return movement, whereby said ball valves will be reseated slowly and injury to their valve seats prevented.

BENJAMIN IV. THU RTELL.

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